:root {
  color-scheme: dark;
  --bg: #0c1020;
  --panel: #121a33;
  --panel-2: #151f3a;
  --border: #243152;
  --text: #e8edf7;
  --muted: #8ea0c8;
  --accent: #7cd7ff;
  --accent-2: #a78bfa;
  --danger: #ff6b6b;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --mono: 'SFMono-Regular', Menlo, Consolas, monospace;
  --sans: 'Inter', 'Noto Sans KR', system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--sans);
  background: radial-gradient(circle at 20% 20%, rgba(124, 215, 255, 0.08), transparent 25%),
    radial-gradient(circle at 80% 10%, rgba(167, 139, 250, 0.08), transparent 22%),
    radial-gradient(circle at 50% 80%, rgba(124, 215, 255, 0.08), transparent 30%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 20px 48px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card {
  background: linear-gradient(145deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
}

.hero h1 {
  margin: 8px 0 12px;
  line-height: 1.3;
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  font-size: 13px;
}

.lede {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.muted {
  color: var(--muted);
  margin: 0;
}

.controls__header h2 {
  margin: 0 0 6px;
}

.controls__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.btn {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #162446;
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.25);
  border-color: var(--accent);
}

.btn:active {
  transform: translateY(0);
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), #59bff0);
  color: #0b1224;
  border-color: transparent;
}

.btn.danger {
  background: linear-gradient(135deg, #ff7b7b, #ff4f4f);
  color: #0b1224;
  border-color: transparent;
}

.layout-two {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 12px;
}

.section-header h3 {
  margin: 0 0 4px;
}

.section-header p {
  margin: 0 0 10px;
}

#pitch-canvas {
  width: 100%;
  height: 220px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0b1224;
  display: block;
}

.score-surface {
  min-height: 220px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0b1224;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
  padding: 12px;
}

.log-surface {
  width: 100%;
  min-height: 160px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0b1224;
  color: var(--accent);
  font-family: var(--mono);
  overflow: auto;
  margin: 0;
}

.help ul {
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.5;
}

.help li + li {
  margin-top: 6px;
}

@media (max-width: 640px) {
  .controls__grid {
    grid-template-columns: 1fr;
  }

  #pitch-canvas {
    height: 180px;
  }
}